. "10 letters"@en . "Correspondence regarding the terms of access for Unger to the Berlin Document Center, his contribution to The Wiener Library’s eyewitness testimony project and a publication of some of his experiences, and the use of material from Library."@en . . . . "Correspondence with Unger, Leon"@en . . . . "This material has been digitised. Readers should book a reading room terminal to access it."@en . "WL3000/9/1/1421" . . . . "For information about the eyewitness testimony collection and access to the compiled reports see the Eyewitness Testimony Collection."@en . . "Leon Unger was a German born Israeli Holocaust survivor and since the mid-1950s a Phd candidate at the London School of Economics."@en .